CN102901002A - Illumination apparatus, display apparatus, and electronic device - Google Patents

Abstract

The invention relates to a lighting device, a display device and electronic equipment. Provided are a lighting device having a wide lighting area even when a connector member is mounted on a light source substrate on which a light emitting element is mounted and in which connector members can be easily connected, a display device including the lighting device, and a display device including the display device. Electronic equipment. In the lighting device (8), a plurality of light-emitting elements (89) are mounted on one side (881) of the light guide plate in the light source substrate (88), and on the other side of the light source substrate (88). The (882) side retains the connector member (71). The light source board (88) includes a metal plate (887) and a flexible wiring board (888) bonded to one side (881) of the metal plate (887). The end portion (889) of the flexible wiring board (888) is not The metal plate ( 887 ) is attached to one surface ( 881 ) and bent to the other surface ( 882 ) to be connected to the connector member ( 71 ).

Description

Lighting device, display device and electronic equipment

technical field

The present invention relates to a lighting device including a light guide plate and a light emitting element, a display device including the lighting device, and electronic equipment including the display device.

Background technique

Among various display devices, a liquid crystal device has a lighting device called a backlight device and a transmissive and/or semi-transmissive display panel (liquid crystal panel) stacked on the light emitting surface side of the lighting device. Among the side end surfaces of the light guide plate, a plurality of light-emitting elements are arranged along the side end surface that becomes the light incident portion. In addition, in the lighting device, a light source substrate is provided along the light incident portion of the light guide plate, and a plurality of light emitting elements are mounted on a surface side of the light source substrate facing the light incident portion. Furthermore, flexible wiring materials such as wiring, lead wires, and flexible wiring substrates are drawn from the light source substrate, and power is fed to the light-emitting element through such wiring materials (Patent Documents 1 to 3). In addition, in the lighting device of Patent Document 1 described in Patent Documents 1 to 3, a connector member is connected to the front end of the wiring drawn from the light source substrate.

Patent Document 1: JP-A-2007-279480 Gazette

Patent Document 2: JP-A-2004-165124 Gazette

Patent Document 3: JP-A-2010-118348 Gazette

As in the configurations described in Patent Documents 2 and 3, in the configuration in which only the flexible wiring material is drawn out from the light source substrate, it takes time and effort to electrically connect the wiring material to the light source drive unit. On the other hand, as in the configuration described in Patent Document 1, if the connector member is connected to the wiring material, electrical connection can be easily performed.

However, even in the case of using a connector member, if the flexible wiring material as described in Patent Document 1 is extended from the light source substrate, excessive force may be applied to the light source substrate through the wiring material during assembly. The load, the light source substrate is deformed. Such deformation is not preferable because the optical axis of the light emitting element will be inclined.

Here, the inventors of the present application proposed a lighting device having a structure in which the connector member 1071 is held by the light source substrate 1088 as shown in FIG. 10 . More specifically, in the illuminating device 1008 shown in FIG. One surface 1881 side of the substrate 1088 for light source. Furthermore, the connector member 1071 is also mounted on the one surface 1881 side of the light source substrate 1088 . Therefore, when the lighting device 1008 is incorporated into the display device, only by bonding the connector member 1076 connected to the wiring material 1077 extending from the light source driving part to the connector member 1071, the light emitting element can be connected via the light source substrate 1088. 1089 for feeding. Therefore, there is an advantage that it is not necessary to extend a flexible substrate from the light source substrate 1088 .

However, in the case of the configuration shown in FIG. 10 , in order to avoid interference between the light guide plate 1080 and the connector members 1071 and 1076, it is necessary to provide a cutout 1809 in the light guide plate 1080, so there is a problem that the illuminated area is narrowed by that amount. . Moreover, since the light guide plate 1080 is in the way when the connector member 1071 and the connector member 1076 are connected after the light source substrate 1088 is disposed on the light guide plate 1080, it is difficult to connect the connector member 1071 and the connector member 1076. Problem connecting to work.

Contents of the invention

In view of the above problems, it is an object of the present invention to provide a lighting device in which the lighting area is wide and the connector members can be easily connected even when the connector member is mounted on a light source substrate on which a light emitting element is mounted. , A display device including the lighting device, and an electronic device including the display device.

In order to solve the above-mentioned problems, the lighting device according to the present invention is characterized in that it includes a light guide plate, a plurality of light emitting elements, a substrate for a light source, and a connector member. The side end surface is arranged along the light incident part; the light source substrate extends along the light incident part, and the plurality of light emitting elements are installed on the side facing the light incident part; The connector member is held on the other surface side of the substrate for light source that is opposed to the one surface side, and is used to feed power to the plurality of light emitting elements.

In the present invention, since a plurality of light emitting elements are mounted on one surface of the light source substrate and the connector member is held on such a light source substrate, power can be fed to the light emitting elements through the connector member. Therefore, since it is not necessary to lead out the flexible wiring material from the light source substrate, an excessive load is applied to the light source substrate through the wiring material during assembly, and the light source substrate is not deformed. In addition, the connector member is held on the other surface side of the light source substrate. Therefore, since it is not necessary to provide a cutout in the light guide plate in order to avoid interference between the light guide plate and the connector member, the illumination area is wide. Moreover, even when the connector member and the connector member paired with the connector member are connected after the substrate for the light source is arranged with respect to the light guide plate, the light guide plate is not in the way, so the connector can be easily performed. Component connection work.

In the present invention, preferably, the light incident portion extends linearly. That is, it is preferable that the light incident portion extends linearly without forming a cutout to avoid interference with the connector member. According to such a configuration, there is an advantage that a wide illumination area can be obtained.

In the present invention, it is preferable that the substrate for a light source includes a support plate constituting the other surface side and a flexible wiring substrate, and the flexible wiring substrate has a first surface attached to the support plate on the one surface side. 1 part and has a second part extending beyond the supporting board along the supporting board; the second part of the flexible wiring substrate is not attached to the one side of the supporting board and bent to the The other side is connected to the connector member. According to such a configuration, there is an advantage that it is not necessary to use a separate wiring material extending from one surface side of the light source substrate toward the connector member on the other surface side.

In the present invention, preferably: the support plate is a metal plate. According to such a configuration, the heat generated by the light emitting element can be dissipated through the metal plate.

In the present invention, the connector member may be configured to be provided on the end side of the light emitting element located on the end side in the longitudinal direction of the light source substrate among the plurality of light emitting elements.

In the present invention, the connector member may be provided in a range where the plurality of light emitting elements are arranged in the longitudinal direction of the light source substrate. That is, in the present invention, since the connector member is held on the other side of the substrate for the light source, it can be installed in a range where a plurality of light emitting elements are arranged in the longitudinal direction of the substrate for the light source, etc. Location constraints are minimal. Therefore, the connector member can be provided at a position suitable for feeding power to the light emitting element.

In the present invention, a plurality of the connector members may be held on the other surface side of the light source substrate. That is, in the present invention, since the connector member is held on the other surface side of the light source substrate, a plurality of connector members and the like can be provided, and there is extremely little restriction on the number of connector members. Accordingly, it is possible to provide connector members suitable for the number of objects to feed power to the light emitting elements.

The illuminating device according to the present invention can be used in a display device, and in this case, the display device has a display panel arranged to be superimposed on the light exit surface side of the light guide plate.

The display device according to the present invention can be used in electronic equipment such as liquid crystal televisions.

Description of drawings

1 is an explanatory diagram of a liquid crystal television (electronic device) including a display device according to Embodiment 1 of the present invention.

2 is an explanatory diagram showing the overall configuration of the display device according to Embodiment 1 of the present invention.

3 is an exploded perspective view of the liquid crystal display device according to Embodiment 1 of the present invention when it is disassembled in more detail.

4 is a cross-sectional view of a main part of the display device according to Embodiment 1 of the present invention.

5 is an explanatory view showing the configuration around a substrate for a light source used in an illumination device for a display device according to Embodiment 1 of the present invention.

6 is an explanatory diagram showing a planar configuration of an illumination device used in the display device according to Embodiment 1 of the present invention.

7 is an explanatory diagram showing a planar configuration of an illumination device used in a display device according to Embodiment 2 of the present invention.

8 is an explanatory view showing the configuration around a light source substrate of an illumination device used in a display device according to Embodiment 3 of the present invention.

9 is an explanatory diagram showing a planar configuration of an illumination device used in a display device according to Embodiment 4 of the present invention.

Fig. 10 is a plan view of a conventional lighting device.

Explanation of symbols

8··lighting device, 10··display panel, 30··second frame, 40··first frame, 50··third frame, 60··light source support member, 71··connector member, 80·· Light guide plate, 80a Light incident part, 80b Light exit surface, 88 Light source substrate, 89 Light emitting element (light source), 100 Display device, 887 Metal plate (support plate), 888・・Flexible Wiring Substrate, 889 ・・Ends of Flexible Wiring Substrate

Detailed ways

A mode in which the present invention is applied to a display device for a liquid crystal television will be described with reference to the drawings. In addition, in the drawings referred to in the following description, the scale is changed for each layer and/or each member so that each layer and/or each member has a size recognizable on the drawing. In addition, in the following description, one of the directions intersecting each other in the in-plane direction of the light guide plate and/or liquid crystal panel (the direction in which the long side of the light guide plate and/or liquid crystal panel (display panel) ) is the X-axis direction, and the other side (the direction in which the short sides of the light guide plate and/or liquid crystal panel (display panel) shown in the drawings extend) is the Y-axis direction, so as to cross the X-axis direction and the Y-axis direction (The direction in which the light guide plate and the liquid crystal panel are laminated as shown in the drawings) is the Z-axis direction. In addition, in the drawings referred to below, one side in the X-axis direction is referred to as the X1 side, the other side is referred to as the X2 side, and one side in the Y-axis direction (the direction in which the protruding portion of the liquid crystal panel is arranged) is referred to as Y1. side, the other side opposite to this is the Y2 side, one side in the Z-axis direction (direction toward the back of the light guide plate) is the Z1 side (lower side), and the other side opposite to this (outgoing illumination light and/or the side where the light is displayed) is shown as the Z2 side (upper side).

Embodiment 1

(overall composition)

1 is an explanatory diagram of a liquid crystal television (electronic device) including a display device according to Embodiment 1 of the present invention, and FIGS. 1(a) and (b) are explanatory diagrams schematically showing the appearance of the liquid crystal television, A block diagram showing the electrical configuration of the display device.

An electronic device 2000 shown in FIG. 1( a ) is a liquid crystal television, and includes a display device 100 and/or a frame 2010 for the television, and the like. As shown in FIG. 1( b ), the display device 100 includes a display panel 10 (liquid crystal panel) described later with reference to FIG. lighting device 8. Furthermore, the display device 100 has a scanning line driving circuit 104 for driving scanning lines extending in the X-axis direction in the display panel 10 and a data line driving circuit for driving data lines extending in the Y-axis direction in the display panel 10. 101. As for the scanning line driving circuit 104 and the data line driving circuit 101 , a configuration in which both are built in the display panel 10 can be adopted. In addition, one of the scanning line driving circuit 104 and the data line driving circuit 101 may be incorporated in the display panel 10 , and the other may be incorporated in a driving IC that is COG-mounted on the display panel 10 . In addition, one of the scanning line driving circuit 104 and the data line driving circuit 101 can be built in the display panel 10, and the other can be built in a driving IC, and the driving IC is mounted on a circuit board electrically connected to the display panel 10. . Furthermore, a configuration in which both the scanning line driving circuit 104 and the data line driving circuit 101 are incorporated in a driving IC separate from the display panel 10 may be adopted.

In this form, the illuminating device 8 has a light guide plate 80 arranged to be stacked on the display panel 10, a plurality of light emitting elements 89 arranged along a side end surface of the light incident portion 80a among the side end surfaces of the light guide plate 80, and a A light source substrate 88 for a plurality of light emitting elements 89 and a light source driving unit 280 that drives the light emitting elements 89 . In this form, the display panel 10 is a horizontally long quadrilateral and has four sides 10a, 10b, 10c, and 10d. Among these sides 10a, 10b, 10c, and 10d, side 10a is a long side located on one side Y1 in the Y-axis direction, side 10b is a long side located on the other side Y2 in the Y-axis direction, and side 10c is a long side located in the X-axis direction. The short side of the other side X2, the side 10d is the short side of the one side X1 in the X-axis direction. Corresponding to such a shape, the light guide plate 80 has four side end surfaces 801 , 802 , 803 , and 804 . Among these side end surfaces 801, 802, 803, 804, the side end surface 801 is located on the long side of one side Y1 in the Y-axis direction, the side end surface 802 is located on the long side of the other side Y2 in the Y-axis direction, and the side end surface 803 is located on the X-axis. The short side on one side X1 in the X-axis direction and the side end surface 804 are located on the short side on the other side X2 in the X-axis direction. In this embodiment, among the four side end surfaces 801 , 802 , 803 , and 804 of the light guide plate 80 , two side end surfaces 801 , 802 facing each other in the short-side direction (Y-axis direction) serve as light incident portions 80 a. Therefore, the light emitting element 89 is arranged along the two side end surfaces 801, 802 (light incident portion 80a) of the light guide plate 80, and the light source substrate 88 is arranged along the two side end surfaces 801, 802 (light incident portion 80a) of the light guide plate 80. ) of various extensions.

In addition, in this form, the power feeding to the light emitting element 89 by the light source driving part 280 is performed via the wiring material 77, the connector 70 including the connector members 71 and 76, and the light source substrate 88 as will be described later. .

(Concrete Configuration of Display Device 100 )

2 is an explanatory view showing the overall configuration of the display device 100 according to Embodiment 1 of the present invention, and FIGS. 2( a ) and ( b ) are a perspective view and an exploded perspective view of the display device 100 . FIG. 3 is an exploded perspective view of the display device 100 according to Embodiment 1 of the present invention when it is disassembled in more detail. 4 is a cross-sectional view of the main part of the display device 100 according to Embodiment 1 of the present invention. FIGS. A cross-sectional view when cut, and a cross-sectional view when the display device 100 is cut along line BB′ in FIG. 1( a ).

In FIGS. 2 , 3 and 4 , the display device 100 of the present embodiment basically includes a lighting device 8 called a so-called backlight device and a transmissive display panel 10 stacked on the top surface of the lighting device 8 . In this embodiment, the display panel 10 includes a transmissive liquid crystal panel. In the display device 100 , the lighting device 8 includes a metal first frame 40 (lower metal frame/metal frame) arranged to cover the back surface of the light guide plate 80 on the lower side (one side Z1 in the Z-axis direction). 40 above the second frame 30 (resin frame) made of resin that holds the end of the display panel 10 and surrounds the lighting device 8 , and is disposed on the upper side (the other side in the Z-axis direction) of the second frame 30 . The third metal frame 50 (upper metal frame) of Z2).

The second frame 30 has a rectangular frame shape that holds the end of the display panel 10 and surrounds the periphery of the display panel 10. In this embodiment, the second frame 30 includes four sides corresponding to the display panel 10 and is divided for each side. 4 frame plates 31, 32, 33, 34. In this embodiment, the second frame 30 is black and functions as a light absorbing member to prevent generation of stray light in the lighting device 8 . The frame plates 31, 32, 33, 34 respectively have side plate portions 311, 321, 331, 341 extending downward on the outer surfaces of the frame plates 31, 32, 33, 34, and the side plate portions 311, 321, 331, 341, the upper plate portions 315, 325, 335, 345 (end plate portions) whose upper edge is bent inward, and the protruding plate portion 312 protruding inward from the halfway position in the height direction of the upper plate portions 315, 325, 335, 345, 322, 332, 342. Therefore, inside the frame plates 31, 32, 33, 34, step portions 313, 323, 333, 343 are formed by the protruding plate portions 312, 322, 332, 342. The portions 312 , 322 , 332 , 342 hold the display panel 10 . In addition, the light guide plate 80 and/or the light emitting element 89 of the lighting device 8 are disposed on the lower side of the protruding plate portion 312 .

The first frame 40 is formed by press working or the like on a thin metal plate such as a SUS plate. The first frame 40 includes a bottom plate portion 45 and three side plate portions 42, 43, 44 erected from three sides other than one side Y1 in the Y-axis direction of the outer peripheral edge of the bottom plate portion 45, and opens as a top surface. rectangular box shape. The side plate portions 321 , 331 , and 341 of the second frame 30 overlap the outer sides of the side plate portions 42 , 43 , and 44 of the first frame 40 as described above. Furthermore, the side plate portion 311 of the second frame 30 covers one side Y1 of the first frame 40 in the Y-axis direction.

Like the first frame 40, the third frame 50 is also formed by press working or the like on a thin metal plate such as a SUS plate. The third frame 50 has a rectangular upper plate portion 55 (end plate portion) and four side plate portions 51 , 52 , 53 , 54 bent downward from the outer peripheral edge of the upper plate portion 55 , and forms a rectangular box with an open bottom. shape. The side plate portions 51 , 52 , 53 , and 54 overlap the outer sides of the side plate portions 311 , 321 , 331 , and 341 of the second frame 30 . A rectangular window 550 through which light emitted from the display panel 10 is emitted is formed on the upper plate portion 55 , and the upper plate portion 55 covers the entire outer peripheral end of the display panel 10 on the display light emitting side.

The third frame 50 , the second frame 30 , and the first frame 40 configured in this way are joined by screws (not shown) or the like, and hold the display panel 10 and/or the lighting device 8 inside. Here, as shown in FIG. 4 , flexible sheets 91 and 92 are attached to the bottom surface and the top surface of the protruding plate portions 312 , 322 , 332 , and 342 of the second frame 30 . Therefore, when the display device 100 is assembled, the display panel 10 is supported by the protruding plate portions 312 to 342 via the flexible sheet 92 . Furthermore, when the display device 100 is assembled, the lighting device 8 is supported via the flexible sheet 91 . Furthermore, when the display device 100 is assembled, the optical sheets (diffusion sheet 182 , prism sheets 183 , 184 , etc.) of the lighting device 8 are suppressed by the flexible sheet 91 so that no floating and/or misalignment occurs.

(Configuration of Display Panel 10 )

As shown in FIG. 2 , FIG. 3 and FIG. 4 , the display panel 10 has a quadrangular planar shape, includes an element substrate 11 on which pixel electrodes (not shown) and the like are formed, and is opposed to the element substrate 11 with a predetermined gap. The opposite substrate 12 arranged oppositely and the sealing material 14 for bonding the opposite substrate 12 and the element substrate 11 together. In such a display panel 10 , the liquid crystal layer 13 is held in a region surrounded by the sealing material 14 . The element substrate 11 and the counter substrate 12 include a light-transmitting substrate such as a glass substrate. In the element substrate 11, a plurality of scanning lines (not shown) extend in the X-axis direction, and on the other hand, a plurality of data lines (not shown) extend in the Y-axis direction, corresponding to the scanning lines and the data lines (not shown). ), a switching element (not shown) and a pixel electrode are arranged.

In this embodiment, the counter substrate 12 is arranged on the output side of the display light, and the element substrate 11 is arranged on the illuminating device 8 side. Further, a frame layer (not shown) including a light-shielding layer is formed along the inner edge of the sealing material 14 on the surface of the counter substrate 12 that faces the element substrate 11 . The display panel 10 is configured as a TN (Twisted Nematic, twisted nematic) method, an ECB (Electrically Controlled Birefringence, electrically controlled birefringence) method or a VAN (Vertical Aligned Nematic, vertically aligned nematic) method liquid crystal panel, and pixel electrodes are formed on the element substrate 11 , and form a common electrode (not shown) on the counter substrate 12 . Also, when the display panel 10 is an IPS (InPlane Switching, in-plane switching) and/or FFS (Fringe Field Switching, fringe field switching) liquid crystal panel, the common electrode is provided on the element substrate 11 side. In addition, the element substrate 11 may also be disposed on the emission side of the display light with respect to the counter substrate 12 . On the top surface of the display panel 10 , an upper polarizing plate 18 is stacked, and a lower polarizing plate 17 is placed between the bottom surface of the display panel 10 and the lighting device 8 .

In this form, the element substrate 11 is larger than the counter substrate 12 . Therefore, the element substrate 11 has a protruding portion 110 protruding from the end of the counter substrate 12 on one side Y1 in the Y-axis direction, and a plurality of flexible wiring boards 200 are connected to the top surface of the protruding portion 110 . The flexible wiring board 200 is connected to a circuit board 250 including a rigid board. On such a circuit board 250, a control IC (not shown) constituting the image signal supply unit 270 described with reference to FIG. An IC (not shown) for driving a light source of the part 280 .

(Configuration of lighting device 8)

5 is an explanatory view showing the configuration around a light source substrate 88 used in the lighting device 8 of the display device 100 according to Embodiment 1 of the present invention, and FIGS. 5( a ) and ( b ) schematically show the light source substrate. An explanatory diagram of the situation on the side of one surface 881 of 88 and an explanatory diagram schematically showing the situation of the other side of the light source substrate 88 on the side of surface 882 . The configurations of the light emitting elements 89 and/or the light source substrate 88 disposed on the two side end surfaces 801 and 802 (light incident portions 80 a ) facing each other in the Y-axis direction of the light guide plate 80 are the same. Therefore, in FIG. 5( a ), the light emitting element 89 and/or the light source substrate 88 arranged on the side end surface 802 of the light guide plate 80 are shown, and in FIG. 801 light emitting element 89 and/or light source substrate 88 and the like.

As shown in FIGS. 3 and 4 , the illuminating device 8 includes a light guide plate 80 stacked on the bottom surface side of the display panel 10 , and a light-emitting surface 89 a facing the light-incident portion 80 a of the light-guide plate 80 . A plurality of light emitting elements 89 are arranged on one side (one side X1 in the X-axis direction) toward the other end side (the other side X2 in the X-axis direction). In this embodiment, a plurality of light emitting elements 89 are mounted on one surface 881 of the light source substrate 88 extending in the X-axis direction along the light incident portion 80a. The light emitting element 89 is an LED (Light Emitting Diode, light emitting diode) that emits white light, and emits light from the light source as divergent light.

In the lighting device 8 of the present embodiment, among the side end surfaces 801 , 802 , 803 , and 804 of the light guide plate 80 , the two side end surfaces 801 , 802 facing each other in the Y-axis direction are used as the light incident portion 80 a. Therefore, the plurality of light-emitting elements 89 direct the light-emitting surface 89 a toward the two light-incident portions 80 a (side end surfaces 801 and 802 ) of the light guide plate 80 . Arranged toward the other end side. The two light source substrates 88 extend along the two light incident portions 80 a (side end surfaces 801 , 802 ), and a plurality of light emitting elements 89 are mounted on one surface 881 of each of the two light source substrates 88 .

In this embodiment, the light guide plate 80 is a translucent resin plate made of acrylic resin and/or polycarbonate resin, and a reflective sheet is stacked between the bottom surface 80c of the light guide plate 80 and the bottom plate portion 45 of the first frame 40. 187. Further, optical sheets such as a diffusion sheet 182 and prism sheets 183 and 184 are stacked between the top surface (light exit surface 80 b ) of the light guide plate 80 and the display panel 10 . In this embodiment, the two prism sheets 183 and 184 are arranged such that their ridgelines are perpendicular to each other. Therefore, the illuminating light emitted from the light emitting surface 80 b of the light guide plate 80 is diffused in all directions by the diffusion sheet 182 , and then passes through the two prism sheets 183 , 184 to generate directivity having a peak in the front direction of the display panel 10 . In the light guide plate 80, on the surface of the side where the reflection sheet 187 is located, a scattering pattern including concave fine depressions and/or a printing layer of a scattering member is formed. Component 89 becomes taller. Therefore, the intensity distribution of the illumination light emitted from the light guide plate 80 becomes uniform regardless of the distance from the light emitting element 89 . As such a scattering pattern, in this embodiment, a plurality of fine concave portions 80e are provided on the bottom surface 80c of the light guide plate 80 .

In the region where the bottom plate portion 45 of the first frame 40 overlaps the side where the side end surface 801 of the light guide plate 80 is located, steps are partially formed between the bottom surface 80c of the light guide plate 80 and the first frame 40 so as to ensure a gap. Curved toward the light guide plate 80 . Thereby, the reflective sheet 187 and the lower plate portion 61 of the light source supporting member 60 can be sandwiched between the bottom surface 80 c of the light guide plate 80 and the bottom plate portion 45 in the gap. In addition, since the bottom plate portion 45 of the first frame 40 is partially bent toward the light guide plate 80 to form a concave portion on the back side of the first frame 40, the flexible wiring board 200 is bent and extended to the bottom plate portion 45 of the first frame 40. The circuit board 250 is disposed within the depth of the recess in such a recess. Therefore, it is possible to reduce the thickness of the lighting device 8 .

In this embodiment, the light source substrate 88 is arranged such that one surface 881 on which the light emitting element 89 is mounted faces the light incident portion 80 a of the light guide plate 80 . Further, the light source substrate 88 has a structure in which a wiring pattern and/or land are provided along with an insulating layer on one surface 881 of a plate-like metal plate 887 (support plate) extending along the light incident portion 80a. Such a configuration can be realized by bonding a flexible wiring board 888 on which a resin base layer, a wiring pattern, an insulating protective layer, etc. are laminated in this order to one surface 881 of a metal plate 887 . Accordingly, the joint portion where the wiring pattern and the chip of the light emitting element 89 are mounted is electrically insulated from the metal plate 887 . In this embodiment, the metal plate 887 includes an aluminum plate, and the metal plate 887 ensures the mechanical strength of the light source substrate 88 and also functions as a heat sink for heat generated from the light emitting element 89 .

As shown in FIG. 3 , FIG. 4 and FIG. 5 , on the other side of the surface 882 of the two light source substrates 88 , the light source supporting members 60 holding the light source substrates 88 are arranged respectively, and the light source supporting members 60 are arranged It is held between the first frame 40 and the second frame 30 . In this embodiment, the light source supporting member 60 is a rod-shaped metal part extending along the other surface 882 of the light source substrate 88 . The light source support member 60 has a lower plate portion 61 overlapping the bottom plate portion 45 of the first frame 40 and a substrate support plate portion 62 constituting a wall surface protruding upward from a midway position in the width direction of the lower plate portion 61 . In addition, the light source support member 60 has an upper plate portion 63 bent from the substrate support plate portion 62 to the side opposite to the side where the light guide plate 80 is located on the upper end side (opposite side to the lower plate portion 61 ) of the substrate support plate portion 62 , The plate portion 63 is fixed to at least one of the upper plate portion 55 of the third frame 50 and the upper plate portions 315 and 325 of the second frame 30 with screws or the like.

In the light source supporting member 60 having such a structure, the surface of the substrate supporting plate portion 62 on the side where the light guide plate 80 is located serves as a substrate holding surface 620 for holding the light source substrate 88, and is fixed to the substrate holding surface 620 by screws or the like. A light source substrate 88 . In this state, the entire surface of the other surface 882 (metal plate 887 ) of the light source substrate 88 is in contact with the substrate holding surface 620 of the light source supporting member 60 and overlapped in close contact. In addition, the light source supporting member 60 is a metal product such as aluminum and/or ferrous metal. Therefore, the heat generated by the light emitting element 89 is transferred from the metal plate 887 of the light source substrate 88 to the light source supporting member 60 , and the heat of the light source supporting member 60 is transferred to the first frame 40 . Therefore, the temperature rise of the light emitting element 89 can be suppressed low.

(Configuration of connector member 71)

FIG. 6 is an explanatory diagram showing a planar configuration of a main part of an illumination device 8 used in the display device 100 according to Embodiment 1 of the present invention.

As shown in FIGS. 5 and 6 , in the lighting device 8 of this embodiment, either side of the two side end faces 801 and 802 (light incident portion 80 a ) of the light guide plate 80 facing each other in the Y-axis direction, and On the other surface 882 side of the light source substrate 88 (the side opposite to the side where the light guide plate 80 is located), the connector member 71 having a bonding surface is attached to one end portion of the light source substrate 88 in the longitudinal direction. More specifically, in the light source substrate 88, the end portion located on one side X2 in the X-axis direction becomes the protruding portion 86 protruding from the end portion of the light source supporting member 60 on the one side X2 in the X-axis direction. The connector member 71 is mounted on the other surface 882 side (outer side) of the 86 . Accordingly, the connector members 71 mounted on the respective two light source substrates 88 are disposed close to the same side (X2 side) in the X-axis direction. Here, on either side of the side end surfaces 801 and 802 to be the light incident portion 80a of the light guide plate 80 , the joint surface of the connector member 71 is not arranged to face the light guide plate 80 , but faces where the light guide plate 80 is located. side to side. Therefore, since the joint surface of the connector member 71 is arranged facing outward, when the light source drive unit 280 is arranged outside (outside) the first frame 40 , the connection work can be easily performed. In addition, the joint surface of the connector member 71 means the surface side where the connector member 71 and the paired connector member 76 are joined. Here, of the connector member 71 and the connector member 76, either one is a male connector, and the other is a female connector. In the case of a male connector, terminals are formed on a convex joint surface; in the case of a female connector, terminals are formed on a concave joint surface.

In this form, the end portion 889 (a part of the flexible wiring board 888 ) on one side X2 in the X-axis direction of the flexible wiring board 888 is formed longer than the length in the extending direction (longitudinal direction) of the metal plate 887 . The long part covers the metal plate 887 so as to include the end side thereof, and is bent to the other surface 882 side of the metal plate 887 . The end portion 889 of such a flexible wiring board 888 is attached to the connector member 71 so that the joint surface is disposed facing outward (the side opposite to the metal plate 887 ). Furthermore, an end 889 of the flexible wiring board 888 is fixed to the other surface 882 of the metal plate 887 by bonding or the like, and the connector member 71 is fixed to the metal plate 887 via the end 889 of the flexible wiring board 888 . In addition, on one surface 881 of the light source substrate 88, the light-emitting element 89 is not mounted in a region overlapping with the portion where the connector member 71 is mounted, and the connector member 71 is provided at an end of the plurality of light-emitting elements 89. The light emitting element 89 in the upper portion is closer to the end portion side in the longitudinal direction of the light source substrate 88 .

Further, the connector member 71 is connected to the connector member 76 constituting the connector 70 at the tip of a lead wire and/or a flexible wiring material 77 such as a flexible wiring board extending from the light source driving unit 280 shown in FIG. 1 . Therefore, simply by joining the connector members 71 and 76 , the light source driving unit 280 can feed power to the light emitting element 89 via the wiring material 77 , the connector 70 and the flexible wiring board 888 .

In the lighting device 8 configured in this way, only the light emitting element 89 protrudes from the light source substrate 88 toward the light guide plate 80 . Therefore, in the light guide plate 80 , the side end surfaces 801 and 802 serving as the light incident portion 80 a linearly extend in the X-axis direction, and no cutout or the like is formed.

In addition, in this form, since the light source drive unit 280 is disposed below the bottom plate portion 45 of the first frame 40, a wire for routing the wiring material 77 to the first frame is formed on the bottom plate portion 45 of the first frame 40. The cutout 450 on the lower side of the bottom plate portion 45 of 40.

(The main effect of this method)

As described above, in the lighting device 8 and the display device 100 of this embodiment, a plurality of light-emitting elements 89 are arranged along the light-incident portion 80a of the light guide plate 80, and such a plurality of light-emitting elements 89 are mounted along the light-incident portion 80a. An extended rigid substrate 88 for the light source. Furthermore, the connector member 71 is held on the light source substrate 88 . Therefore, power can be fed to the light emitting element 89 via the connector member 71 . Therefore, since there is no need to lead out flexible wiring material from the light source substrate 88, an excessive load is applied to the light source substrate 88 through the wiring material during assembly, and the light source substrate 88 is not deformed. Therefore, the optical axis of the light emitting element 89 does not incline due to deformation of the light source substrate 88 .

Furthermore, the light emitting element 89 is mounted on the one surface 881 side of the light source substrate 88 (the side where the light guide plate 80 is located), and the connector member 71 is held on the other surface 882 side of the light source substrate 88 . Therefore, it is not necessary to provide a cutout in the light guide plate 80 in order to avoid interference between the light guide plate 80 and the connector member 71 . Therefore, since the light incident part 80a extends linearly, the illumination area is wide. In addition, even when the connector members 71 and 76 are connected after the light source substrate 88 is disposed on the light guide plate 80, the light guide plate 80 is not in the way, so the connector members 71 and 76 can be easily connected. Work.

In addition, the light source substrate 88 includes a metal plate 887 as a support plate and a flexible wiring board 888 bonded to one side 881 of the metal plate 887, and the end 889 (part of the flexible wiring board 888) of the flexible wiring board 888 is not The one surface 881 side of the metal plate 887 is bonded and bent to the other surface 882 side to be connected to the connector member 71 . Therefore, there is an advantage that no separate wiring material needs to be extended from the one surface 881 side of the light source substrate 88 toward the connector member 71 on the other surface 882 side.

Also, in the light source substrate 88, the metal plate 887 is used as a support plate. Further, the substrate supporting plate portion 62 of the metal light source supporting member 60 is arranged to overlap the metal plate 887 constituting the other surface 882 of the light source substrate 88 . Therefore, the heat of the light emitting element 89 can be dissipated through the light source substrate 88 , the light source supporting member 60 , and the first metal frame 40 .

Embodiment 2

7 is an explanatory diagram showing a planar configuration of a main part of an illumination device 8 used in a display device 100 according to Embodiment 2 of the present invention. In addition, since the basic structure of this embodiment is the same as that of Embodiment 1, the same code|symbol is attached|subjected to the same part, and their description is abbreviate|omitted.

In Embodiment 1, one connector member 71 is provided for the light source substrate 88 , but a plurality of connector members 71 may be provided at positions separated in the longitudinal direction of the light source substrate 88 . For example, in the lighting device 8 shown in FIG. 7 , the connector members 71 are provided at both ends of the light source board 88 . That is, in this embodiment, since the connector member 71 is held on the other surface 882 side of the light source substrate 88 , the restriction on the number of the connector members 71 is extremely small. Accordingly, it is possible to provide the number of connector members 71 suitable for feeding power to the light emitting elements. Therefore, even when the number of light emitting elements 89 increases as the display surface of the display device 100 increases in size, power can be fed to the light emitting elements 89 through the plurality of connector members 71 .

Embodiment 3

8 is an explanatory view showing the configuration around a light source substrate 88 used in the lighting device 8 of the display device 100 according to Embodiment 3 of the present invention, and FIGS. 8( a ) and ( b ) schematically show the light source substrate. An explanatory diagram of the situation on the side of one surface 881 of 88 and an explanatory diagram schematically showing the situation of the other side of the light source substrate 88 on the side of surface 882 . The configurations of the light emitting elements 89 and/or the light source substrate 88 disposed on the two side end surfaces 801 and 802 (light incident portions 80 a ) facing each other in the Y-axis direction of the light guide plate 80 are the same. Therefore, in FIG. 8( a ), the light emitting element 89 and/or the light source substrate 88 arranged on the side end surface 802 of the light guide plate 80 are shown, and in FIG. A light emitting element 89 and/or a substrate 88 for a light source.

Although it is configured in Embodiments 1 and 2 above that when the connector member 71 is provided at the end of the light source substrate 88 , the one surface 881 of the light source substrate 88 is not at the position where the connector member 71 is mounted. However, as shown in FIG. 8 , it is also possible to mount the light emitting element 89 in a region overlapping with the portion where the connector member 71 is mounted on one surface 881 of the light source substrate 88. . That is, the light emitting elements 89 are mounted side by side up to the end of the light source substrate 88 , and the connector members 71 are arranged such that at least part of their mounting (mounting) areas overlap the back side of the outermost light emitting elements 89 . Therefore, the light source substrate 88 protrudes from the light source supporting member 60 in the direction in which the light source supporting member 60 extends, and the surface of the protruding portion that does not face the light guide plate 80 (the other surface 882 side) Connector members 71 are configured to engage corresponding connector members 76 . The connector member 71 is provided at an end of the light source substrate 88 , but is provided within a range where a plurality of light emitting elements 89 are arranged in the longitudinal direction of the light source substrate 88 . According to such a configuration, even when the connector member 71 is used, the width dimension (dimension in the X-axis direction) of the light source substrate 88 can be suppressed to a necessary minimum. That is, by mounting the connector member 71 on the back surface that does not face the light guide plate 80 in the light source substrate 88 , the light emitting elements 89 can be lined up to the end of the light source substrate 88 . Therefore, the incident light from the end of the light guide plate 80 in the direction in which the light emitting elements 89 are arranged (X-axis direction) can be realized, and even the end of the light guide plate 80 can be effectively and widely used as the lighting device 8 without wasting an area. .

Embodiment 4

FIG. 9 is an explanatory diagram showing a planar configuration of a main part of an illumination device 8 used in a display device 100 according to Embodiment 4 of the present invention. In addition, since the basic structure of this embodiment is the same as that of Embodiment 1, the same code|symbol is attached|subjected to the same part, and their description is abbreviate|omitted.

As shown in FIG. 9 , in this embodiment, as in Embodiment 2, two connector members 71 are provided at positions separated in the longitudinal direction of the light source substrate 88 . Here, one connector member 71 (connector member 711 ) among the plurality of connector members 71 is provided at an end portion of the light source substrate 88 . On the other hand, the other connector member 71 (connector member 712 ) is provided substantially at the center of the light source substrate 88 in the longitudinal direction, and is provided within a range where a plurality of light emitting elements 89 are arrayed. That is, in the present embodiment, since the connector member 71 is held on the other surface 882 side of the light source substrate 88 , restrictions on the arrangement position of the connector member 71 are extremely small. Accordingly, it is possible to provide the number of connector members 71 suitable for feeding power to the light emitting elements. Therefore, even when the number of light emitting elements 89 increases as the display surface of the display device 100 increases in size, the connector member 71 (connector member) provided at the end of the light source substrate 88 can 711 ) and the connector member 71 (connector member 712 ) provided substantially in the center of the light source substrate 88 in the longitudinal direction to feed power to the light emitting element 89 .

In addition, in the case where the connector member 71 (connector member 712) is provided substantially at the center of the light source substrate 88 in the longitudinal direction, the substrate support of the light source support member 60 described with reference to FIG. 5 and the like may be partially cut off. The connector member 71 is disposed on the other surface 882 of the light source substrate 88 for the board portion 62 and the like. In addition, when electrically connecting the connector member 71 (connector member 712 ) provided substantially in the longitudinal direction of the light source substrate 88 to the light emitting element 89 , it is possible to branch off from the middle part of the flexible wiring substrate 888 in the longitudinal direction. A portion (a part of the flexible wiring board 888 ) is bent to the other surface 882 of the light source board 88 to be connected to the connector member 712 .

other implementations

In the above-mentioned embodiment, an example in which two connector members 71 are provided has been described as an example in which a plurality of connector members 71 are provided on one light source substrate 88, but three or more connector members may be provided. 71.

In Embodiment 4 described above, an example in which the connector member 71 is provided at the end of the light source substrate 88 and substantially in the center of the light source substrate 88 in the longitudinal direction has been described, but it is also possible to place the connector member 71 only at the length of the light source substrate 88 . The connector member 71 is provided substantially in the center of the direction.

In Embodiments 1 to 4 above, the light-emitting element 89, the light source substrate 88, and the connector member 71 are provided in the same configuration on the side end surface 801 side of the light guide plate 80 and the side end surface 802 side of the light guide plate 80, but The side end surface 801 side of the light guide plate 80 and the side end surface 802 side of the light guide plate 80 are set to have different configurations. Furthermore, in Embodiments 1 to 4, the present invention is applied to both the side end surface 801 side of the light guide plate 80 and the side end surface 802 side of the light guide plate 80 , but the present invention may be applied to only one side.

In Embodiments 1 to 3, the light emitting element 89, the light source substrate 88, and the connector member 71 are provided on both the side end surface 801 side of the light guide plate 80 and the side end surface 802 side of the light guide plate 80. The present invention is applied to the lighting device 8 in which the light emitting element 89 , the substrate for light source 88 , and the connector member 71 are provided only on one side.

Mounting example on electronic equipment

In the above-mentioned embodiment, a liquid crystal television was exemplified as the electronic device 2000 equipped with the display device 100, but other than the liquid crystal television, it may also be used in a monitor of a personal computer, a digital signage, a car navigation device, or a mobile phone. The display device 100 to which the present invention is applied is used as a display unit of electronic equipment such as an information terminal.

Claims (9)

1. lighting device is characterized in that having:

LGP;

A plurality of light-emitting components, it makes light-emitting area towards the side end face of the conduct light incident section of this LGP and arranges along described smooth incident section;

The light source substrate, it extends along described smooth incident section, and in a side's who faces described smooth incident section face side described a plurality of light-emitting component is installed; With

Connector members, it remains in described light source with face side substrate and the opposed the opposing party of a face side described side, is used for described a plurality of light-emitting components are carried out feed.

2. lighting device according to claim 1 is characterized in that:

Linearity ground, described smooth incident section extends.

3. lighting device according to claim 1 is characterized in that:

Described light source possesses support plate and the flexible printed circuit board of the face side that consists of described the opposing party with substrate, this flexible printed circuit board have with respect to this support plate fit in a described side the face side part 1 and have along this support plate and surmount the part 2 that this support plate extends;

The described part 2 of described flexible printed circuit board do not fit in described support plate a described side the face side bend to described the opposing party's face side and be connected in described connector members.

4. lighting device according to claim 3 is characterized in that:

Described support plate is metallic plate.

5. lighting device according to claim 1 is characterized in that:

The light-emitting component that described connector members is arranged at than the end side of the length direction that is positioned at described light source usefulness substrate among described a plurality of light-emitting components more leans on described end side.

6. lighting device according to claim 1 is characterized in that:

Described connector members is arranged at described light source with arranging in the scope of described a plurality of light-emitting components in the length direction of substrate.

7. lighting device according to claim 1 is characterized in that:

Described connector members is a plurality of with described the opposing party's of substrate face side maintenance at described light source.

8. display unit is characterized in that:

Possesses lighting device according to claim 1;

Has overlay configuration in the display floater of the light emergence face side of described LGP.

9. electronic equipment is characterized in that:

Possesses display unit according to claim 8.

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